Ezra 4:7

And in the days of Artaxerxes wrote Bishlam, Mithredath, Tabeel, and the rest of their companions, unto Artaxerxes, king of Persia; and the writing of the letter was written in the Syrian tongue and interpreted in the Syrian tongue.

2 Kings 18:26

Then said Eliakim, the son of Hilkiah, and Shebna and Joah unto Rabshakeh, Speak, I pray thee, to thy slaves in the Syrian language, for we understand it, and do not talk with us in the Jews' language in the ears of the people that are on the wall.

Daniel 2:4

Then the Chaldeans spoke to the king in Syriack, O king, live for ever; tell thy servants the dream, and we will show the interpretation.

Isaiah 36:11

Then said Eliakim and Shebna and Joah unto Rabshakeh, Speak, I pray thee, unto thy slaves in the Syrian language, for we understand it, and do not speak to us in the Jewish language, in the ears of the people that are on the wall.

Ezra 4:9

Then wrote Rehum, the chancellor, and Shimshai, the scribe, and the rest of their companions, the Dinaites, the Apharsathchites, the Tarpelites, the Apharsites, the Archevites, the Babylonians, the Susanchites, the Dehavites, and the Elamites,

Ezra 4:17

The king sent this answer unto Rehum, the chancellor, and to Shimshai, the scribe, and to the rest of their companions that dwell in Samaria and to the rest of those of the other side of the river and to Cheenet.

Ezra 5:6

The copy of the letter that Tatnai, captain of this side the river, and Shetharboznai, and his companions, the Apharsachites, which were on this side the river, sent unto Darius, the king:

Treasury of Scripture Knowledge

Summary

And in the days of Artaxerxes wrote Bishlam, Mithredath, Tabeel, and the rest of their companions, unto Artaxerxes king of Persia; and the writing of the letter was written in the Syrian tongue, and interpreted in the Syrian tongue.

Bishlam

The syrian tongue

Bible References

Bishlam

Ezra 4:9
Then wrote Rehum, the chancellor, and Shimshai, the scribe, and the rest of their companions, the Dinaites, the Apharsathchites, the Tarpelites, the Apharsites, the Archevites, the Babylonians, the Susanchites, the Dehavites, and the Elamites,
Ezra 5:6
The copy of the letter that Tatnai, captain of this side the river, and Shetharboznai, and his companions, the Apharsachites, which were on this side the river, sent unto Darius, the king:

The syrian tongue

Isaiah 36:11
Then said Eliakim and Shebna and Joah unto Rabshakeh, Speak, I pray thee, unto thy slaves in the Syrian language, for we understand it, and do not speak to us in the Jewish language, in the ears of the people that are on the wall.
Daniel 2:4
Then the Chaldeans spoke to the king in Syriack, O king, live for ever; tell thy servants the dream, and we will show the interpretation.